Reversible chuck-jaw



(No Model.)

2 Sheets-Sheet 2.

G. MADUELL.

REVERSIBLE CHUCK Law.

No. 258,783. Patented May 30, 1882.

IJV' VEJV TOR C'a rzo JIawZzae ZZ,

I f ,By

WITNESSES 3U. AWWV.

PATENT street CARLOS MADUELL, OF NEW ORLEANS, LOUISIANA.

REVERSIBLE CHUCK-JAW.

SPECIFICATION forming part of Letters Patent No. 258,783, dated May 30,1882.

Application filed February 16, 1882- (No model.)

To all whom it may concern Be it known that I, OARLos MADUELL, a citizenof Spain, residing at New Orleans, in the parish of Orleans and State ofLouisiana,

have invented certain new and useful Improvements in ReversibleChuck-Jaws; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which to it appertains to make and use the same.

My invention relates to improvements in reversible chuckjaws for lathes;and the object is to construct such jaws so that they can be readily andeasily reversed for the purpose I 5 of holding objects of varyingdiameter in the same chuck-plate.

The invention consists in the construction and arrangement of the partsof a chuck-jaw, as will be more fully described hereinafter, referencebeing had to the accompanyin g drawin gs and the letters of referencemarked there on.

In the drawings like letters refer to like parts and in the saiddrawings, Figure 1 rep- 2 5 resents a plan view of a chuck-plate with myimproved jaws attached. Fig. 2 is a vertical cross-section of Fig. 1.Fig. 3 is an end view of the jaw, the parts being secured together. Fig.4 is a perspective view of the jaw with the two parts detached. Fig. 5is a side view of a jaw, showing the upper part reversed in dottedlines. Fig. 6 is a side and end view of a modified form of reversiblechuck-jaws. Fig. 7 is a vertical cross-section of a modified form ofchuck plate and jaws in position.

In the drawings, A represents the chuckplate, in this instance what istermed a scroll chuck-plate, although my improved chuckjaw can bereadily applied to any of the wellknown styles of other chuck plates.This chuck-plate is provided with the usual teeth, a, with which theteeth h of the lower part, 0, of the reversible jaw B engage. The jaw iscomposed of the lower part, 0, and the upper part, D. The lower part, 0,has on each side a groove, 0 c, which engages with the ordinary ways orguides on the plate A. On its upper side the part0 has adovetail tongue,d, which fits into the groove e in the upper part, D. The two parts 0 Dare secured together by a transverse key, f, which passes through thedovetail tongue and groove. On the upper face of the part D are arrangedthe usual steps 9 to embrace the object to be turned. The lower part,

0, is further provided with teeth h, which mesh with teeth t on the backof a bevel-wheel, E. Thejaws are in this instance operated by the bevelwheel E, arranged in the rear side of the chuck plate A, and into saidwheel one or more bevel-pinions mesh, which can be oper- 6o ated by aproper keyto engage with the square ends on the pinion-shafts. Insteadof this arran gement the jaws may, however, be provided with lugs 70 onthe part 0 instead of the teeth. Said lugs are then tapped to receivescrews F, which are supported in the recessed rim A of the chuck-plate.The back G is in this instance, as well as in the first case, maderemovable, so that the screws, with their collars l, or thebevel-pinions, can be placed in position, as shown in Figs. 7 and 2.

These jaws may be made complete to suit different styles and sizes ofchuck-plates, and sold in the market as a new article of manufacture. 75

Many other methods of operating the jaws would suggest themselves tothose skilled in the art; but I do notclaim such arrangements, as myinvention relates to the reversibility of the chuck-jaws for any kind ofchuck-plate.

To operate or use the jaws it is only necessary to take out the key,slide the upper part off from the lower part, reverse it, and thenreplace the upper part and key.

It will be thus seen that objects of greatly varying size and diametercan be readily and quickly clamped or held in position on thechuck-plate.

I am aware that chuck-jaws have been made in two parts, which wereprovided with dovetail grooves and tongues arranged at right angles tothe adjusting-screws; but these are not reversible, as the screw-threadswill not permit the reversing of the parts.

I am also aware that chuck-jaws have been 95 made reversible andprovided with a mortise and tenon and held together by dowel-pins, and Itherefore disclaim such constructions; but,

Having thus described my invention, what I I00 claim, and desire tosecure by Letters Patent, 1s

1, The combination, with a chuck-plate, of the reversible chuck-jaws B,consisting of the parts 0 D,provided with radial grooves 0, and foradjustment, all arranged substantially as [O tongues (Z of dovetailshape, and secured toand for the purpose set forth.

gether by means of keysf, aileonstrueted and In testimony whereof Ihereby aflix my sigarranged substantially as shown and specified. inature in presence of two Witnesses.

:) ri n l .4. lhe combination, Wlth a ehuch plate, of CARLOS MADUELL thereversible chuck-jaws B, consisting of the parts (J D, having dovetailedshape grooves c, Witnesses:

and tongues 61, arranged radially on the parts PAUL GUNEA,

C D, secured together by keys f, and means JAMES P. MAGI.

